Short cycles in digraphs with local average outdegree at least two.
A note on the number of edges guaranteeing a in Eulerian bipartite digraphs.
Extension of strongly regular graphs.
Discrepancy of matrices of zeros ond ones.
Some inequalities in functional analysis, combinatorics, and probability theory.
Characterization of -bar visibility trees.
Linearized oscillation results for even-order neutral differential equations
Oscillation and nonoscillation of neutral differential equations with positive and negative coefficients
In this paper, oscillattion and nonoscillation criteria are established for neutral differential equations with positive and negative coefficients. Our criteria improve and extend many results known in the literature.
Some Questions on Metrizability
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